Mounting furnace-hearths.



Patented Dec. 26 1916.

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UTLEY WEDGE, OF ARDIVIORE, PENNSYLVANIA.

MOUNTING FURNACE-HEARTHS.

Specification of Letters Patent. Pgmgntgd DQQ, 25, 1916,,

Application filed April 13, 1915. Serial No. 21,062.

1. b all whom it may concern.

Be it known that I, UrLnY \Vnnen, a citizen of the United States, residing in Ardmore, Pennsylvania, have invented certain Improvements in Mounting Furnace- Hearths, of which the following is a specification.

My invention relates to an annular rotary furnace of the type shown in my application for Patent Serial No. 822,346, filed March 4, 1914, the object of my present invention being to provide effective means for mounting the hearths upon the fixed and rotating members of such a furnace. This ob ject I attain in the manner hereinafter set forth, reference being had to the accompanying drawing which represents in vertical section parts of the fixed and rotating members of the furnace.

The fixed outer annular structure 1 of the furnace carries the fixed inwardly projecting hearths which may be partly plain as shown at 2 and partly muffled as shown at 2*, or all plain or all mufiled, as desired. The inner annular rotating structure 3 carries the movable hearths which may likewise be partly plain as at 4 and partly muffled as at 4, or all plain or all muffled, as desired.

The outer wall 1 of the furnace is preferably composed of inner and outer members 5 and 6 and the outer fixed hearths are supported and retained in place by a sort of cantaliver structure comprising blocks 7 embedded in the inner member 5 of the wall and bearing upon the under sides of the hearths and other blocks 8 embedded in the outer member of the wall and bearing upon the upper sides of the hearths, as shown in the drawing, the inwardly projecting portions of the hearths being thereby rigidly held against vertical displacement and thus amply equipped to sustain the weight of the charge deposited upon them in its passage through the furnace.

The blocks 7 and 8 may be composed of metal, firebrick, or other material and are preferably hollow so as to provide for the circulation of a cooling agent through them,

and said blocks may be so disposed as to form continuous rings extending throughout the annular wall structure 1 or they may form segments of any desired extent distributed throughout said wall, as desired.

The rotating hearths 4 and 4 pass through and project outwardly from an annular wall 9 carried by the rotating structure of the furnace and composed, preferably, of hollow blocks filling the spaces between the successive hearths, the inner portion of each hearth carrying an angle-iron 10 or equivalent structure which bears against the inner face of the wall 9 and prevents dislodgment of the hearths 4 and 4 Any suitable means of mounting and rotating the annular structure 3 may be adopted without departing from the essential features of my invention. In the present instance, the structure has wheels 11 running upon an annular rail 12, the wheel axles 11 being rotated from a shaft 13 by means of worm gears 14 and 15, and the shaft 13 being rotated by any suitable form of power device mounted upon and rotating with the structure 3.

I claim:

1. The combination, in a furnace, of a wall having projecting hearths and cantaliver supports therefor comprising fulcrum members on the under sides of the hearths and retaining members on the upper sides of the hearths in a difierent vertical plane from that of said fulcrum members.

2. The combination, in an annular furnace, of the outer fixed structure, hearths projecting inwardly therefrom, and means contained in said outer structure for mounting said hearths, said means comprising fulcrum blocks on which the hearths rest and retainer blocks bearing upon the upper surfaces of the hearths and disposed outwardly beyond said fulcrum blocks.

3. The combination, in an annular furnace, of the outer fixed structure, hearths projecting inwardly therefrom, and means contained in said outer structure for mounting said hearths, said means comprising fulcrum blocks on which the hearths rest and retainer blocks bearing upon the upper surface of the hearths and disposed outwardly beyond said fulcrum blocks, said outer structure comprising an inner member in which the fulcrum blocks are contained and an outer member containing the retainer blocks.

4. The combination, in an annular furnace, of the inner rotating member having an annular wall, and hearths passing through said wall and projecting outwardly beyond the same, those portions of said hearths which project inwardly beyond the '6. An annular furnace having a rotating member provided with an annular wall 10 carrying projecting annular hearths, said wall being composed of hollow blocks filling the spaces between adjoining hearths.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

UTLEY WEDGE.

Witnesses:

T., B. PORTER, FRED HAMIsoH.

Copies of this patent may be obtained for Me cents each, by addressin the (commissioner of Patents Washington, D, up I v 

